【作者】 代婧鑫； 丁学勇； 徐海法； 刘程宏； 唐昭辉； 董越；

【Author】 Dai Jingxin;Ding Xueyong;Xu Haifa;Liu Chenghong;Tang Zhaohui;Dong Yue;School of Metallurgy, Northeastern University;Baosteel Research Institute;

【机构】 东北大学冶金学院； 宝钢中央研究院；

【摘要】 针对以氮气为输送介质的水平管高密相煤粉气力输送,基于颗粒动力学理论与摩擦应力模型,结合Huilin曳力模型构建了水平管高密相气力输送数值模型,并使用该模型进行模拟计算。模拟结果表明;随着表观气速的增加,气相压损和总压损均呈上升趋势,但气相压损在总压损中所占比例十分小;每条流动特性曲线上都会出现压降相对最低点,该点所对应的输送气速就是最经济速度;在设计输送时,要根据压降-气速流态图确定最经济速度,实际输送气速要稍大于最经济速度,以降低输送能耗,保证输送系统的稳定性。更多还原

【Abstract】 Aimed at pneumatic conveying of dense phase pulverized coal in horizontal,based on the kinetic theory of granular flows incorporating friction stress model for solids stress,Huilin drag model for the interaction between gas and particles. Therefore,a two-phase flow model was established for simulating on pneumatic conveying of dense phase pulverized coal in horizontal. The simulation results show that with the increase of superficial velocity, both gas phase pressure drop and total pressure drop show an upward trend, but gas phase pressure drop accounts for a small proportion of total pressure drop. The relative minimum point of pressure drop appears on each flow characteristic curve. The relative minimum point of pressure drop appears on each flow characteristic curve, and the superficial velocity corresponding to this point is the most economical speed. When designing, the most economical speed should be determined according to the pressure drop-gas velocity flow diagram. The actual superficial velocity should be slightly larger than the most economical speed to reduce the transportation energy consumption and ensure the stability of the conveying system.更多还原